TCMT1105

Overview

The TCMT1105 is a single-channel transistor output optoisolator manufactured by Vishay Semiconductor Opto Division. It features an infrared-emitting diode optically coupled to a phototransistor in a 4-SOP package. Key electrical parameters include a maximum collector-emitter voltage of 70V and a peak forward current of 60mA. The device provides 3750Vrms isolation voltage with a typical CTR range of 50% to 150% at 5mA input. Switching characteristics include turn-on/turn-off times of 9.5µs/8.5µs and rise/fall times of 5.5µs/7µs. It operates within a temperature range of -40°C to 100°C.

Feature Summary

• Provides galvanic isolation between input and output circuits using optical coupling technology.
• Features a standard transistor output configuration suitable for digital signal transmission.
• Designed for surface-mount installation in compact 4-lead SOP packages.

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops requiring electrical isolation

Procurement Notes

Verify the specific ordering suffix (e.g., TR, CT, DKR) against your manufacturing requirements, as these indicate different packaging formats such as tape-and-reel or cut-tape. Confirm that the 4-SOP package dimensions align with your PCB footprint design. Ensure compliance with RoHS3 standards if required by your project specifications. Cross-reference the manufacturer part number with official datasheets to confirm the exact electrical tolerances and thermal ratings before finalizing procurement.

Selection Notes

Select this component when a single-channel isolation barrier is required with moderate speed switching capabilities. The 70V output voltage rating suits low-voltage logic interfaces. Consider the 50-150% CTR range for reliable signal transfer across varying temperatures. The 4-SOP package offers a compact solution for space-constrained designs. Evaluate the 3750Vrms isolation rating against system safety requirements to ensure adequate protection levels.

Part Context

The TCMT1105 belongs to the TCMT11xx series of transistor output optocouplers from Vishay. This series utilizes gallium arsenide infrared emitters paired with silicon phototransistors. The components are designed for general-purpose isolation applications where cost-effectiveness and reliability are prioritized. The series supports various lead counts, with the TCMT1105 specifically offering a four-lead configuration for single-channel operation.

Replacement Considerations

Consult the official Vishay TCMT1100-TCMT1109 datasheet for direct pin-compatible alternatives within the same series. Verify that any substitute maintains the 3750Vrms isolation rating and 4-SOP package form factor. Ensure the replacement device meets the same switching time and CTR specifications for circuit compatibility.